Development platform based on Espressif's ESP32 chip, a 32-bit Dual-Core Tensilica LX6 microcontroller with a 240 MHz clock frequency, 520 kB internal SRAM memory, Wi-Fi 802.11 b / g / n , Dual-mode Bluetooth (classic and BLE) and 28 I / O pins.
On the board there is also a 32 MB flash memory, Wi-Fi antenna, a 0.96-inch OLED display, lithium battery charging circuit and interface, CP2102 USB to serial chip, two push buttons (one for reset and the other for GPIO 0) and 2 status LEDs. Ideal for IoT applications (Internet of Things), it can be programmed using the Arduino IDE.
The package also includes two 18-pin strips and stickers with the number and type of pins (TX, RX, GND, 3V3, 5V, RST).

• OLED size and color: 0.96 inch blue 
• 32-bit Dual-Core Tensilica LX6 microcontroller
• 240 MHz clock frequency
• 520 KB SRAM
• 32MByte Flash
• Wi-Fi 802.11 b / g / n 
• Dual-mode Bluetooth (classic and BLE)
• Operating voltage: 3,3 V to 7 V
• 28 GPIO
• Lithium battery charging circuit and interface
• Operating temperature: -40°C to +90°C

• Datasheet (ESP32)
• ESP32.com
• Espressif ESP32 Resource Page